<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
    <script type="text/javascript">
    let json = {
      a: 12,
      /*
      show: function()
      {
        alert(this.a);
      }
      */
      show()
      {
        alert(this.a);
      }
    };

    json.show();
    </script>
  </head>
  <body>

  </body>
</html>
